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Through-Skin Pilot-Hole Detection and Localisation with a Mechanically-Translatable Atomic Magnetometer

Maddox, B; Cohen, Y; Renzoni, F; (2022) Through-Skin Pilot-Hole Detection and Localisation with a Mechanically-Translatable Atomic Magnetometer. Applied Physics Letters , 120 (1) , Article 014002. 10.1063/5.0081274. Green open access

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Abstract

We demonstrate through-skin electromagnetic induction imaging of pilot-holes in an aluminum block concealed by a 0.41 mm thick aluminum shield with a 1.49 kg mechanically translatable radio frequency atomic magnetometer. The pilot-holes are identified and localized with submillimeter accuracy both with and without the Al shield. We utilize a dual-frequency technique to isolate the image of the target while removing the effect of the shielding from the image. Imaging accuracy is shown to be robust in a range of different operating conditions and immune to the effect of a thermal insulator between the shielding and the target. The approach introduced here finds direct application in aircraft wing manufacture and is competitive with existing approaches.

Type: Article
Title: Through-Skin Pilot-Hole Detection and Localisation with a Mechanically-Translatable Atomic Magnetometer
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/5.0081274
Publisher version: https://doi.org/10.1063/5.0081274
Language: English
Additional information: © 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http:// creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/5.0081274
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10141053
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